Issues

• Add dedicated tests for parallel mode

  parallel checkingtopic-tests
  python/mypy#21343 · Filter by author ilevkivskyi opened on Apr 27, 2026

• Backslashes become forward slashes in literal types in tests

  bugtopic-tests
  python/mypy#20884 · Filter by author wyattscarpenter opened on Feb 24, 2026
  4

• [dev] audit -skip tests

  topic-developertopic-tests
  python/mypy#20881 · Filter by author wyattscarpenter opened on Feb 24, 2026
  1

• Add new syntax to let the mypy test file syntax anticipate --pretty output

  topic-tests
  python/mypy#20811 · Filter by author wyattscarpenter opened on Feb 14, 2026
  2

• [dev] wrong-version version tests disappear completely, but should probably skip instead

  bugtopic-tests
  python/mypy#20398 · Filter by author wyattscarpenter opened on Dec 11, 2025
  1

• TypeForm: Add covering incremental mode and daemon tests

  topic-teststopic-type-form
  python/mypy#20125 · Filter by author davidfstr opened on Oct 26, 2025
  1

• --update-data introduces new blank lines when aligning multi-line expected info comments

  bugtopic-developertopic-tests
  python/mypy#19940 · Filter by author wyattscarpenter opened on Sep 27, 2025
  1

• There are no tests for mypy.plugins.proper_plugin

  topic-developertopic-tests
  python/mypy#19890 · Filter by author wyattscarpenter opened on Sep 20, 2025
  2

• Stderr in regular tests should probably go to out as well

  bugtopic-developertopic-tests
  python/mypy#19554 · Filter by author wyattscarpenter opened on Jul 31, 2025

• "# E:" lines (etc) in test files are ignored at the beginning of lines

  topic-developertopic-tests
  python/mypy#19547 · Filter by author wyattscarpenter opened on Jul 31, 2025

• (🐞) --update-data removes escapes

  bugpriority-2-lowtopic-tests
  python/mypy#17465 · Filter by author KotlinIsland opened on Jul 2, 2024
  2

• test_update_data fails when -x is in PYTEST_ADDOPTS

  bugtopic-tests
  python/mypy#16265 · Filter by author mtelka opened on Oct 14, 2023

• Rewrite .test as .py

  featuretopic-developertopic-tests
  python/mypy#15326 · Filter by author ikonst opened on May 30, 2023
  4

• Test suite with py37-windows-64 is the bottleneck

  bugtopic-developertopic-tests
  python/mypy#15303 · Filter by author ikonst opened on May 24, 2023

• Cache test requirements in GitHub actions

  featuretopic-developertopic-tests
  python/mypy#15301 · Filter by author ikonst opened on May 24, 2023

• Trim "mypy/tests/testX.py::XDataSuite::" from test items

  featuretopic-developertopic-tests
  python/mypy#15260 · Filter by author ikonst opened on May 17, 2023

• assert == on two floating numbers? Really?

  topic-mypyctopic-tests
  python/mypy#15221 · Filter by author mcepl opened on May 11, 2023
  1

• Inconsistent behavior w.r.t missing builtins

  bugtopic-developertopic-tests
  python/mypy#14547 · Filter by author ikonst opened on Jan 28, 2023
  3

• Test is_proper_subtype with string literals

  topic-tests
  Unread
  python/mypy#14011·ikonst opened Nov 5, 2022 · Updated Dec 11, 2022
  5

• Test and document MYPY_FORCE_COLOR/FORCE_COLOR

  documentationfeaturetopic-configurationtopic-tests
  python/mypy#13815 · Filter by author AlexWaygood opened on Oct 4, 2022
  14

• mypyc incremental failures on master

  topic-incrementaltopic-mypyctopic-tests
  python/mypy#13572 · Filter by author hauntsaninja opened on Aug 31, 2022
  11

• Missing unit test dependencies on Linux?

  bugdocumentationtopic-tests
  python/mypy#12903 · Filter by author edreamleo opened on May 29, 2022
  4

• TestExternal.test_c_unit_test fails on FreeBSD

  bugtopic-mypyctopic-tests
  python/mypy#12634 · Filter by author AMDmi3 opened on Apr 21, 2022
  1

• Failing testDaemonStatusKillRestartRecheck

  bugtopic-daemontopic-tests
  python/mypy#12571 · Filter by author sterliakov opened on Apr 12, 2022

• Tests don't pass if MYPY_CACHE_DIR is set

  bugtopic-developertopic-tests
  python/mypy#11869 · Filter by author hauntsaninja opened on Dec 29, 2021